JPH08232513A - Lever handle lock - Google Patents

Abstract

PURPOSE: To perform locking by locking rotation of a lever handle through operation of a lock lever, to form the seat of a lever handle in a compact manner, to make lock structure solid and prevent the occurrence of a trouble, to improve appearance in such a way that a mounting screw hole is prevented from being left remaining on a door surface, to improve facility, and to reduce a manufacturing cost. CONSTITUTION: A base end part 52a of one lever handle of a pair of lever handles is protruded in an opening 70a of a lever handle rotation regulating plate 70 supported on the inner surface of a corresponding seat 54. Through operation of a cam in linkage with a rock lever, the lever handle rotation regulation plate 70 is moved. Rotation of the lever handle is locked for locking in such a way that a protrusion 70d formed on the inner side of one end of the opening 70a is protruded in a stepped part 52b formed in a desired spot on the outer peripheral surface of the base end part 52a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of locking the rotation of a lever handle by operating either a lock lever or an emergency unlocking operation section, in addition to a forward / backward operation of a latch bolt by operating a lever handle. The present invention relates to a lever handle lock that can be made compact and a seat that holds a base end of a lever handle can be made compact.

[0002]

2. Description of the Related Art A handle lock capable of locking the rotation of a lever handle by operating either a lock lever or an emergency unlocking operation portion in addition to a forward / backward operation of a latch bolt by operating a pair of lever handles. Has existed since the past.

FIG. 10 is a view showing one side portion of a lever handle lock having a conventional structure as an example, FIG. 11A is a rear view thereof, and FIG. 11B is housed on the back side of a seat. It is the figure which showed the surface of the lever handle rotation control plate.

As shown in these drawings, in a lever handle lock 1 having a conventional structure, a base end 2a of a lever handle 2 attached to an outer surface of a door is fitted and supported in an opening 3a formed in a seat 3. The connecting shaft 10 supported between the base ends of the lever handle 2 and the other lever handle (not shown) communicates with the inside of the lock body (not shown), and the lock body is operated by operating the lever handle 2 respectively. The latch bolt 6 can be advanced and retracted from the side end of the.

The emergency unlocking operation member supported by the seat 3 or the lock lever supported by the other seat is operated to raise the cam 17 provided on the back side of the seat 3, The lever handle rotation restricting plate 15 provided on the back surface of the seat 3 so as to be slidable in the vertical direction is pushed up, and the protrusion 15a formed at the tip of the lever handle rotation restricting plate 15 is attached to the lever handle 2. By making the lower end edge 12b of the arc-shaped turning plate 12 supported by the base end 2a thereof to set the turning range,
The structure is such that the downward rotation of the lever handle 2 can be locked.

Further, by operating the emergency unlocking operation member or the lock lever supported on the other seat, the cam 17 is tilted and the lever handle rotation restricting plate 15 is retracted, whereby the rotation plate 12 is rotated. By locking the protrusion 15a protruding from the lower end edge 12b and rotating the lever handle, locking and unlocking can be performed. Since one end of the locking piece 13 screwed to the back surface of the lever 3 is in contact with the back surface of the lever 3, the lever handle 2 does not rotate upward more than necessary.

In addition to the above, the rotation restricting plate 15 of the lever handle 2 is retracted (lowered) by its own weight or the urging force of a spring.

Further, the outer end portion of the unlocking operation portion 8 has a disc shape, and a groove on the outer surface of which the coin or the like can be rotated in the unlocking direction using the end portion in an emergency. 8b is engraved.

Further, two types of upper and lower identification indicators 15b and 15c are provided on the surface of the lever handle rotation restricting plate 15, and the display window 3d opened in the seat 3 is used to unlock / lock the state. That is, the identification displays 15b and 15c corresponding to the "empty" and "on" states of the room can be exposed.

[0010]

However, in the lever handle lock of the above-mentioned conventional structure, since the seat is formed to be long in the vertical direction, there is room in the mounting position of each member, so that each member is large and robust. On the other hand, the lever handle rotation restricting plate 15 is positioned below the base end portion 2a of the lever handle 2, and the lever handle rotation restricting plate 15 is further moved forward and backward. Since the cam 17 and the lock lever (not shown) that is these operation parts and the emergency unlocking operation part 8 are arranged to lengthen the seat 3 in the vertical direction, a seat larger than desired is formed. Therefore, the seat may not be well-balanced to fit the lever handle.

Further, since the seat 3 is long in the vertical direction, when the lever handle lock 1 is mounted on the door, it is necessary to open mounting screw holes on the door surface corresponding to the vicinity of the upper end and the lower end of the seat 3, and thereafter. When replacing the lever handle 2, unless the lever handle 2 having a seat of the same size is attached, the mark of the attachment screw hole is exposed on the door surface and it becomes unsightly. The same applies to the seat of the lever handle attached to the opposite side of the door.

Further, if the seat 3 is elongated in the vertical direction, it is an obstacle to reduction of manufacturing cost.

Recently, as a lever handle lock which solves such a problem, a compact circular one has been created without forming the seat of the lever handle up and down. Although the lever handle lock has a compact seat, the position for accommodating the member that locks the rotation of the lever handle is narrowed, so each member is small and the strength of the locking member is poor. There is a drawback that the locking member is easily broken when a large force is applied.

The present invention has been proposed in view of these circumstances, and is provided for raising a cam that is interlocked with a lock lever and an emergency unlocking operation portion at an inner position of one of the pair of seats. Along with this, the lever handle rotation restricting plate is advanced, and a protrusion formed at one end in the lengthwise direction inside the opening of the lever handle rotation restricting plate is located at a desired position on the outer peripheral surface of the base end of the lever handle. It is designed to be able to lock the rotation of the lever handle by thrusting it into the formed step part, and the door can be locked by moving the latch bolt forward and backward by operating the lever handle. The lock handle can be locked by turning the lever handle by operating the lock lever, and the lever handle seat is compact but has a robust structure, leaving mounting screw holes on the door surface. It without, appearance is good, ease of use is good, an object of the present invention is to provide a useful lever handle locks that can reduce the production cost at a low cost.

[0015]

SUMMARY OF THE INVENTION A lever handle lock according to the present invention, which is proposed to achieve the above objects, comprises a pair of lever handles attached to a door of a private room and a base portion of the pair of lever handles. A pair of seats having at least openings for inserting and supporting the ends and a connecting rotary shaft connected between the base ends of the lever handles are inserted, and the latch bolt advances and retracts in conjunction with the connecting rotary shafts. A lever having at least a lock body having a structure, a lock lever provided on one seat to fix the rotation of the lever handle, and an emergency unlocking operation part provided on the other seat. In the handle lock, a lever handle rotation restricting plate is held at an inner position of one of the pair of seats so as to be slidable along one direction of an inner surface of the seat. An opening long in the sliding direction is opened in the dollar rotation restricting plate, the base end of the lever handle protruding from the seat protrudes into this opening, and the cam of the cam interlocking with the lock lever and the emergency unlocking operation portion is formed. With the start-up, the lever handle rotation restricting plate is advanced, and a protrusion formed at one end in the longitudinal direction inside the opening of the lever handle rotation restricting plate is provided on the outer peripheral surface of the base end of the lever handle. The lever handle is locked into the stepped portion formed at a desired position to lock the rotation of the lever handle, and the lever handle rotation restricting plate is retracted in accordance with the fall operation of the cam, so that the protrusion is It is characterized in that the lever handle can be freely rotated by disengaging it from the step portion.

[0016]

In the lever handle lock according to the present invention, the lever handle can be rotationally locked by rotating the lock lever from the inside of the room, and the emergency unlocking operation unit can also be opened from the outside of the room as necessary. The rotation locking of the lever handle can be released by rotating the. In the following description, "locking / unlocking" does not mean a state in which the door is locked by the advance of the latch bolt, but locks the rotation of the lever handle and, as a result, locks the backward movement of the latch bolt. Say.

The base ends of the lock lever and the unlocking operation portion are linked by a single connecting member and interlock with each other, and the emergency unlocking operation portion provided on the outside of the room is designed to identify a key or the like in an emergency. A groove 68b is engraved on the outer surface of the disk-shaped outer surface of which an end portion of a coin or the like can be hooked and rotated so that it can be unlocked without requiring any material.

The operation movements of the lock lever and the unlocking operation portion are transmitted to a small cam, and the lever handle is held in the back surface of one (outdoor side) seat by the rising due to the rotation of the cam. The motion restriction plate advances in one direction along the seat surface.

In this lever handle rotation restricting plate, an opening into which the base end of the corresponding lever handle projects is formed long along the moving direction of the lever handle rotation restricting plate, and one end inside the opening is formed. A protrusion is formed, and when the lever handle rotation restricting plate is moved in the advancing direction, the protrusion is projected into a step portion formed at a desired position on the outer peripheral surface of the base end of the lever handle.

That is, the lever handle rotation restricting plate is
In the unlocked state, the protrusion is retracted to a position where it does not project into the step due to the spring bias, and in the locked state, the protrusion advances in the direction in which the protrusion projects into the step due to the cam.

Since the base end of the lever handle is projected into the opening of the lever handle rotation restricting plate as described above, the size of the lever handle rotation restricting plate is necessary and sufficient as if it were a frame material surrounding the base end. It can be suppressed to the minimum size, and since the protrusion is formed inside the opening,
Even when a large force is applied to the lever handle in the state where the protrusion is thrust into the stepped portion, the lever handle rotation restricting plate itself is supported by the base end of the lever handle, so that a stable state is obtained. Since the base end of the lever handle can be locked and the plunge position is close to the pivot axis,
It has a sturdy locking structure that prevents biased force from being applied to the lever handle rotation restriction plate.

Further, since the lever handle rotation restricting plate is positioned so as to surround the base end of the lever handle, the seat for accommodating the lever handle rotation restricting plate or the like can be made compact.

In order to identify the locked / unlocked state from the outside of the room, a display window is opened in the seat on the outside of the room, and an identification display attached to the surface of the lever handle rotation restricting plate (for example, from the inside of the display window). "Red" when locked, "blue" when unlocked
The display corresponding to the movement of the lever handle rotation restricting plate can be exposed.

When the seat has such a compact shape, the mounting screw holes required for mounting the seat on the door surface are also accommodated inside the seat, so that the lever handle lock of a different type will be replaced thereafter. Even if you do, you can prevent the situation where the marks of the mounting screw holes are unsightly and exposed on the door surface.

[0025]

Embodiments of the lever handle lock according to the present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. 1 is an overall perspective view of a lever handle lock according to the present invention, FIG. 2 is an exploded perspective view showing a lever handle and a seat on a side attached to one end surface (inner side) of a door, and FIG. 3 is another end surface (outer side) ) Is an exploded perspective view showing the lever handle lock on the side to be attached to the door and this seat and the locking mechanism portion, and FIG. 4 is a partial sectional view showing the seat on the side attached to the other end surface (outside) of the door from the back side. Including drawings, Fig. 5 (a) is a rear view of the lever handle rotation restricting plate, (b) is the same front view, (c)
Is a cross-sectional view taken along the line AA, FIG. 6 is a view showing the seat on the side where the locking mechanism at the time of unlocking is attached to the other end surface (outer side) of the door, from the back side, FIG. Sectional drawing which looked at the state which attached the lever handle lock to the door from the end surface side of the door, and FIG. 9 is a plane sectional view of the same.

As shown in FIG. 1, a lever handle lock 50 according to the present invention includes a pair of lever handles 51 and 52 mounted on the inner and outer surfaces of a door, and base ends 51a and 52a of these lever handles 51 and 52, respectively. Blocks are roughly divided into blocks 53, 54 for inserting and supporting 52a to be attached to the corresponding doors, and a lock main body 56 provided with a latch bolt 55 in a state in which it can be advanced and retracted from its tip.

As shown in FIGS. 1 and 2, the peripheral edge of the seat 53 on the inner side surface (inside the room) of the door is circular when viewed from the front, and the peripheral edge is raised toward the door surface direction. On the outer surface of the seat 53, a lowered seat surface 53a for attaching the decorative plate 61 is formed, and an opening 5 for inserting and supporting the base end 51a of the lever handle 51 at the center position thereof.
3b is provided, and an opening 53c for inserting and supporting the base end 63a of the lock lever 63 is provided at a lower position thereof, and a small hole 53d for attaching the decorative plate 61,
53d and mounting screw holes 53e, 53e, ... Are provided at appropriate places.

The base end 51a of the lever handle 51 and the lever handle 52 attached to the seat 54 on the other side.
A connecting member 66 in the shape of a square rod is connected to the base end 52a of the connecting member 66. The connecting member 66 is fitted in the opening 56a of the operating portion 56b formed in the lock body 56, The structure is such that the latch bolt 55 moves forward and backward in accordance with the turning operation of the lever handles 51 and 52.

A base end 63a of the lock lever 63,
A connecting member 67 is connected to the base end 68 a of the emergency unlocking member 68 provided on the other seat 54.

As shown in FIG. 3, an opening 54a for inserting and supporting a base end 52a of a corresponding lever handle 52 is provided at a central position of a seat 54 attached to the outside of the door (outside of the room).
An opening 54b for inserting and supporting the base end 68a of the unlocking operation portion 68, and a display window 54c for identifying the locked / unlocked state from the outdoor side are formed.

Further, substantially frame-shaped ribs 54e, 54e for supporting the lever handle rotation restricting plate 70 slidably in one direction along the inner side surface of the seat 54 are erected on the back surface of the seat 54. The lever handle rotation restricting plate 70 is mounted on the pedestal surfaces 54f, 54f formed inside the ribs 54e, 54e in a vertically slidable state.

54g and 54g are pillars for connecting the seat 54 to the other seat 53, and the screw holes 53 formed in the other seat 53 are formed on the tip surfaces of the pillars 54g and 54g.
Screw holes corresponding to e and 53e are opened.

As shown in FIGS. 3 and 5, the lever handle rotation restricting plate 70 has an elongated hole-shaped opening 7 into which the base end 52a of the lever handle 52 is projected.
0a is opened, the long hole direction of the opening 70a is elongated in the sliding direction, and the base end 52a of the lever handle 52 projects into the opening 70a regardless of the sliding position. Is being maintained.

As shown in FIGS. 3 and 6 to 9, spring stoppers 70 are provided at both ends of the lever handle rotation restricting plate 70.
b and 70b are bent toward the back surface of the seat 54, and the lever handle rotation restricting plate 70 is attached to the ribs 54e,
The spring stoppers 70b and 70b and the rib 54 are mounted on the pedestal surfaces 54f and 54f inside 54e.
The springs 72, 72 holding the repulsive force against the compression are housed between the tips 54e ', 54e' of the e, 54e.

These lever handle rotation restricting plates 70
The holding plate 78 screwed to the upper surfaces of the ribs 54e and 54e prevents the ribs 54e from being unintentionally separated.

A trapezoidal projection 70d is formed on the inner surface of one end of the opening 70a of the lever handle rotation restricting plate 70 on the side of the connecting member 67, and the base end 52a of the corresponding lever handle 52 is formed. Steps 52b and 52b are formed at positions where the protrusions 70d project when the lever handle 52 is in the locked position (horizontal direction). The protrusion 52d projects into the step 52b, whereby the lever handle 52 extends. The rotation of (51) is locked and locked.

In the figure, the step portions 52b and 52b are
The location (upper and lower positions in the figure) is formed so that the mounting direction of the lever handle 52 can be changed so that the opening and closing position of the door can be opened to the right or left. Even at the position, the protrusion 52d can be inserted into the step portion 52b of the lever handle 52.

On the surface of the lever handle rotation restricting plate 70, an identification display 70f in which a private room inside the door from the display window 54c of the seat 54 is displayed in a color or the like showing an "empty" or "on" state, 70g is attached to the identification display 70f, 70 corresponding to the sliding position of the lever handle rotation restricting plate 70.
g can be exposed through the display window 54d.

The sliding of the lever handle rotation restricting plate 70 is brought into contact with and moved by a rise caused by rotation of a small cam 68f formed at the base of the emergency unlocking operation part 68. The emergency unlocking operation section 68 or the lock lever 63 is rotated.

[0040]

According to the lever handle lock of the present invention as described above, the door can be opened and closed by operating the lever handle and the door can be locked as the latch bolt advances and retracts, and the lock lever and the unlocking operation portion can be operated. By rotating the lever, the cam can be raised and the lever handle can be locked to lock.

Particularly, this lever handle rotation restricting plate is
Form an opening that allows the base end of the lever handle to enter,
Since it is located so as to surround this base end, even if a strong force is applied to the lever handle during locking, the lever handle rotation restricting plate remains supported at this base end, and the lever handle rotation Since the force applied to the regulation plate can be received near the axis of the base end, no force is forcibly applied to the lever handle rotation regulation plate.

As a result, the seat of the lever handle can be made into a compact and good-looking shape, no mounting screw holes are left on the door surface, the usability is good, and the manufacturing cost can be kept low. Produce the effect of.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a lever handle lock according to the present invention.

FIG. 2 is an exploded perspective view showing a lever handle and a seat on a side attached to one end surface (inside) of a door.

FIG. 3 is an exploded perspective view showing a lever handle lock on the side attached to the other end surface (outer side) of the door, the seat and a locking mechanism portion.

FIG. 4 is a diagram including a partial cross-sectional view showing a seat on the side attached to the other end surface (outside) of the door from the back surface side.

FIG. 5A is a rear view of the lever handle rotation restricting plate,
Similarly, (B) is a surface view and (C) is a sectional view taken along line AA.

FIG. 6 shows the other end surface (outside) of the door when the lock mechanism is unlocked.
It is the figure which showed the seat of the side attached to the back side.

FIG. 7 is a view of the same when locked.

FIG. 8 is a cross-sectional view of a state in which the lever handle lock is attached to the door as seen from the end surface side of the door.

FIG. 9 is a plan sectional view of the same.

FIG. 10 is a view showing one side portion of a lever handle lock having a conventional structure.

FIG. 11A is a back view of one side portion of a lever handle lock having a conventional structure, and FIG. 11B is a view showing a surface of a lever handle rotation restricting plate housed on the back side of a seat. .

[Explanation of symbols]

50 Lever handle lock 51,52 Lever handle 51a, 52a Lever handle base end 52b (formed on the outer peripheral surface of the lever handle base) Step 53,54 Seat 54c Display window 63 Lock lever 66,67 Connecting member 68 Emergency unlocking operation unit 70 Lever handle rotation restricting plate 70a Lever handle rotation restricting plate opening 70d Protrusion 72 Spring

Claims (1)

[Claims] 1. A pair of lever handles attached to a door of a doorway of a private room, a pair of seats having at least an opening through which the base ends of the pair of lever handles are inserted and supported, and between the base ends of the lever handles. A lock main body having a structure in which a connecting rotary shaft connected to the above is inserted and a latch bolt advances and retracts in conjunction with the connecting rotary shaft, and one lock seat for fixing the rotation of the lever handle. A lock lever and an emergency unlocking operation part provided on the other seat, the lever handle lock being provided at an inner position of one of the pair of seats. The motion restricting plate is held in a slidable manner along one direction on the inner surface of the seat, and an opening long in the sliding direction is opened in the lever handle rotation restricting plate to allow the lever handle to protrude from the seat. The end portion of the lever protrudes into the opening, and the lever handle rotation restricting plate is advanced with the rise of a cam that interlocks with the lock lever and the emergency unlocking operation part. A protrusion formed at one end in the longitudinal direction inside the opening of the lever handle into a step portion formed at a desired position on the outer peripheral surface of the base end of the lever handle to lock the rotation of the lever handle, In addition, the lever handle rotation restricting plate is retracted in accordance with the fall operation of the cam, and the protrusion is disengaged from the step portion, so that the lever handle can be freely rotated. Lever handle lock.